diff --git a/src/Viewer/fg_os_osgviewer.cxx b/src/Viewer/fg_os_osgviewer.cxx
index c723049..0fdd391 100755
--- a/src/Viewer/fg_os_osgviewer.cxx
+++ b/src/Viewer/fg_os_osgviewer.cxx
@@ -587,7 +587,10 @@ void fgOSFullScreen()
      * single display) - so we detect full screen mode using "WindowDecoration" state instead.
      * "false" - even when a single window is display in fullscreen */
     //bool isFullScreen = x == 0 && y == 0 && width == (int)screenWidth && height == (int)screenHeight;
-    bool isFullScreen = !window->getWindowDecoration();
+    
+    //bool isFullScreen = !window->getWindowDecoration();
+
+    bool isFullScreen = true;
 
     SG_LOG(SG_VIEW, SG_DEBUG, "Toggling fullscreen. Previous window rectangle (" << x << ", " << y << ") x (" << width << ", " << height << "), fullscreen: " << isFullScreen << ", number of screens: " << wsi->getNumScreens());
     if (isFullScreen) {